* {
  margin: 0;
  padding: 0;
}
html,
body {
  width: 100%;
  position: relative;
}
a {
  text-decoration: none;
  color: gray;
}
nav {
  width: 100%;
  height: 80px;
  background-color: white;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 1;
}
nav img {
  float: left;
  margin: 30px 0 0 100px;
}
nav ul {
  width: 500px;
  display: flex;
  list-style: none;
  float: right;
  justify-content: space-around;
  line-height: 80px;
  margin-right: 100px;
}
nav li {
  font-size: 20px;
  color: grey;
}
main {
  width: 100%;
  height: 600px;
  background-image: url(https://uat-brand.heytap.com/content/dam/heytap-brand/assets/png/video.jpg);
  background-repeat: no-repeat;
  background-position: 100%;
  color: white;
}
main div {
  text-align: center;
  margin: auto;
  padding-top: 200px;
}
main p {
  width: 800px;
  text-align: center;
  margin: auto;
  font-weight: bold;
  line-height: 30px;
}
main h1 {
  font-size: 70px;
  text-align: center;
}
main span {
  display: block;
  width: 150px;
  height: 50px;
  background-color: white;
  text-align: center;
  line-height: 50px;
  color: green;
  margin: 30px auto;
  border-radius: 30px;
}
section {
  width: 100%;
  background-color: rgb(248, 249, 252);
}
h2 {
  height: 100px;
  background-color: rgb(248, 249, 252);
  text-align: center;
  padding-top: 100px;
  font-size: 30px;
}
h2::after {
  content: "";
  width: 50px;
  height: 8px;
  display: block;
  background-color: rgb(86, 208, 133);
  margin-left: 48%;
  margin-top: 10px;
}
h1::selection {
  color: cyan;
}
p::selection {
  color: cyan;
}
span::selection {
  color: cyan;
}

article {
  width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-around;
}
article a {
  display: block;
  width: 200px;
  height: 250px;
  background-color: white;
  position: relative;
  text-align: center;
}
article a:hover {
  transform: scale(1.1);
}
article img {
  position: absolute;
  top: 50px;
  left: 60px;
}
article span {
  text-align: center;
  line-height: 300px;
  font-size: 24px;
}
aside {
  width: 198px;
  height: 48px;
  border: 1px solid black;
  margin: auto;
  text-align: center;
  line-height: 50px;
  border-radius: 10px;
  font-weight: bold;
  transition: 0.5s;
  margin-top: 80px;
}
aside:hover {
  background-color: rgb(86, 208, 133);
  color: white;
  border-color: rgb(86, 208, 133);
}
.tel {
  font-size: 32px;
  font-weight: bolder;
  text-align: center;
  margin-top: 70px;
  padding-bottom: 80px;
}
footer {
  width: 1200px;
  height: 300px;
  margin: auto;
  margin-top: 50px;
  font-weight: bolder;
  position: relative;
}
footer .left {
  width: 400px;
  height: 300px;
  float: left;
  display: flex;
  flex-direction: column;
  line-height: 40px;
}
footer .right {
  float: left;
  display: flex;
  flex-direction: column;
  width: 400px;
  height: 300px;
  line-height: 40px;
}
footer p {
  font-size: 20px;
}
footer a {
  font-size: 18px;
}
footer a:hover {
  color: rgb(86, 208, 133);
}
footer span {
  color: #cecece;
  position: absolute;
  left: 0;
  bottom: 50px;
}
